Gearing.



PATENTED PEB.' 26, 1907. A B. LJUNGSTROM.

GEARING.

APPLICATION FILED JULzs, 1905.

Z SHEETS-SHEET 1.

l No' B. LJUNGSTROM. GEARING APPLIOATION FILED JULY 26, 1905.

f ever, the rotating speed nsnrrosrnorror sroonnonn, sri/EDEN, AssIGNoR 'ro AKTIEBO i iiiftGE' SEPARATOR, 0F STOCKHOLM, SWEDEN, A CGMPANY.

esserne..

nu. sendos. f

Speciceton of Letters Patent.

resented rs1. se, 1907."

Application filed July 26. 19'05. Serial No. 2471.369.

.To will whom, t may concern: v

Be it known that l, BIRGER LJUNGsrRoM, e subject of the King of Sweden, 'residing et Stockholm, Sweden, have invented a new and useful improvement inV Gearings, of which the followingisa hill, clear, and exact description, reference being had to the accompanyine drawings, which. form e part-oi this speciication.

My invention relates to e gearing device for effecting a certain relative motion be tween two shafts, and more perticularlytwo hisE speed sh arts in line with each other and resigned torotate in the same direction. vGearing devices of this kind are used in diiieru ent machines, among which are centrifugal machines forseparsting solid matter hom liquids, .in which e, device within the bowl is driven from e shaft within the hollow drivingshet ci the bowl, the first shaft having' a :motion which relatively to the shaft ofy the bowl is verjvslow.

Jccording to this invention the desired motion between the two shafts is effected b v means ci smell gear-wheels rotating around their own axes, the shaft of the centriilgal bowl.

s, how' of a centrifugal bowl said axes also rotatin aroundver? f i'iigl1,"tliese wheels rotating lbodilv hon, end Zz its oever, v fhsvingr hollow extensions c c. pissed within the extension l two shafts between.Y which 'the desired relative speed or motion is.l purpose of. the` aronnd the shaft oi the centrifugal bowl would on account oi the centrifugal force 'nress so herd on their bearingsthet great dif ricul'ties would arise against their being jourand'possibljv'malre it impracticebie to gonrfnel their. at eil. By lnyinvention such dii'icuities ere geering niechsnisr'n is so arranged' that it up very srnallspace.

.in the drawings, Figure 1 is a vertical section, and Fig. 2 a horizontal section, of one of mechanism embodying-my invenn tion... Fig. 3 1s e vertical section oe modifiserien iisg. fr is a schematic view.

The torni shown in iigs.l i. end y2 will be forst described. c isa frame in the form of a the bor; and covcrboth c or the boircover. c end d are the ltslbe 'e'.ieoted, yend for the present .description l1t may be assigned th the sh'st'cisdr-iven t the die The shaft d is.,l

evoided, and, besides, the whole rotate on shaftsfnendatthe seine time roll 7 around thejnio'n ic, imparting a rotary `mo" a suitable drivinlsrzj-shai't,l the shaft d being driven by the shaft' c and having imparted to. it the desired speed of rotation relative to the shaft c through the medium of the gearingv device .within vthe box. e is a third shaft within the extension c of the box. This shaft may be assumed for the purposes' of the present description to be stationery, although it may rot-ate provided it rotate in e direction opposite to shui t c or in the same direction atV s different speed.v The shaft e is on its upper end provided with e cog-wheely or pinion f, gearing into the two gear orlcog wheels g. The gears g are provided with shafts 71., press.- ing against the rollinsurfaces or the ,inner walls of the annular' frames j,.which are secured to the -boX a. The shafts h have rather e large diameter compared with the wheels g and are embraced by the frame or cross-piece i, rotatable around the axes of the shafts c d e. 7hen a. relativo motion is efected between the shaft e and pinion f and. 75 the shaft c and box a, said motion being, for instance, effected by rotating the box a and fixing the shaft e, the gears 7 willrotate aroundthe axis of the box a. On account of the centrifugal force they will then press the shafts L hard against the rollingsuraces of the'frames j. `Azsthe gears-g, however, mesh with the pinion f they wili when. being brought around. the axis of thebox a rotate around their own axis and so the shafts 7L will roll upon the rollingsnrfaces of the frames j. The gears g with their shafts hwill thus-get aplanetwise motion around the exis ofthe box a, impart- .ing a rotary motion to the cross-piece i. is a pinion secured to the cross-piece fthe axis of the'pinon coinciding with-the axes' of the g shafts c d. e. m is e cog-ring or circuler rack with internal teeth secured tothe inner wall the box o. The two spur sfeer or 'oogf wheels l are placedbetweenand lrnesh withl .95 the pinion /c and rack .The oog'-wheels L rotate ,oneshaftsv n, thaty 'projectfrozn the ranror disko',l secured tothe shaft d;

f As the 'crossfpiecefirotates .es above de- 'o scribed the pmioncrrotates, "andthe gears Z :voo on the rack m, endv consequently the shafts e l and gears l will et e jplenetwise -motion tion to the iskoand s aft d. f Inthis we werden relerirelrfrathesh tA c and box a, and thus the desired relative motion between shaft cand shaft d is effected.r

The operation of the gearing will be better I understood if the box c be thought fixed and the vshaft e rotated. Then the p nion j,

meshing with the gears g, will rotate them, whereby the sharts h will roll upon the roll- 1 ing-suri'aces, imparting a rotarymotion to the cross-piece fi and the pin-on lc. 0f

course thespeed of the pin-on lr will be very l low relatively to the speed of the pinion f.

The pinion k, meshing with the geqars l, wiil rotate them, whereby on account of their meshing with the cog-ring m they will get a planetw'ise motion around the axis of the box a. They then impart a rotary motion to the dislro, the speed or' said disk beng very ,low relatively to the speed of the pin.oii 7c. Thus the shagtd will rotate at a very low speed relatively to the shaft e;

' rl'he construction shown in Fig. 3 differs from that shown in Figs. 1 and 2 in the iollowing respects: rl he frames j and rack m are place within and secured to a ring p, separate from and rotatable with referenre to the box a. The crosspiece i is secured to the bottom of the box ay by nieans of the screws g. As in thefirst-described construction, the gears driven from the p-nion j, rotate aroun their shafts. As, however, in this construction the cross-piece li is fixed relatively to the box a, the iranie will obviously be rotated by means of the shafts h. The rack m, being secured to the ring y), which is secured to the frame j, rotates with the frame j, and thegears l, engaging both the pinion k and rack m, rotate on shafts n ,and at the same time roll on rack m, impartinga planetwise motion to the gears Z and shafts n, and thus rotating disk o and shaft d. In this 4way the desired relative motion between shaft c and shaft (l is effected.

Having now fully described my invention,

what I claim, and desire to protect by Let'-,r

ters Patent, is-

1. The combination withthe two shafts to be driven with a definite relative speed, of a third shaft and three frames, the first frame having a circumferential rollirglsurface, a pinion and gears and their shafts carried by the sec-0nd frame, the gearshafts frictionally -engaging said rollingsurface, gears carried Iby`the third frame, a rack connected with one of the first two frames so as to rotate therewith, the` last-named gears engaging the pinion and rack and a pinion on the third ,shaft engaging the first-named gears, one of the first two frames being connected to one of the driven shafts and: the third frame connected to the other driven shaft.

2. The combination with the two. shafts to be driven with a definite relative speed, of a third shaft, all of said shafts having common axes, a pinion on the third shaft, gears outside the thirdt shaft engaging said pinion,

5 gear-shafts, a frame having a circumferential l rolling-suri'ace with which' the shafts of said gears engage, a `frame carrying said gears, one of said frames being connected with the l first driven shagt, a pinion secured to the gear-carryirig frame whose axis is common to the axes or' said shafts, a circular rack connected with the frame having the rolling-surl face so as to turn therewith, gears engaging i the last-nanied p-nion, and a third trarne carrying the last-named gears and connected to the second driven sha.'t. l 3. The combination with the two Shafts to i be driven `with a definite relative speed, of a I third shaft, a pinion thereon, gears engaging said p nion, gear-shafts, a frame carrying said sha.ts, an annular frame surroundmg the third shaft between which and said frame sa.d gears are arranged, the inner face of the last-named frame constituting a rolling-sur face with which the shafts of said gears frietgonally engage, one of said frames being connected with one of the said driven shagts, a p nion secured to the gear-carrying frame, a circular rack connected with the annular fraine so as to turn therewith, gears engaging the last-named pinion and the rack, and a third trame connected to the second driven shaQt and carrying the last-named gears.

Li. Tric combination with the two shafts tobc diivcii with a definite relative speed, of a box tui ning with the first shaft, gears in saidbox` gear-shafts, a tliird shaft, a pinion there.- i on engaging said gears, and two frames, one. frame carrying t,.e shafts of said gears and the other fianze having a rolling-surface with which the shafts of said gears fiietionally engage, onc of said franies being secured t'o- -stid box, a pinion secured to the gear-carry-- ing frange, a'ciicular rack with in the box com nectedffwitii the frame having a rolling-surface sb as to turn therewith, gears in said bpx! l,between and engaging the last-named3pm;-V f ioriand the rack, and a tl. ird franze connected, to thesecond driven shaft and carrying the last-nained'gears. i

5. The combination with the two shafts to. be driven with a definite relative speed, both shafts having a ccmnicn axis and the second shaft revolvinglr witi in the hollow filst shaft, of a box tuining with the rst shaft, a ttird shaft whcse axis is coniinon to tie axes of the other shafts and wli ich turns within the first shaft, gears in'said box between the axes 0f said shafts andthe circumferential wall of the box, gear-shafts, a pinion on the third shaft engaging said gears, and two. frames witin the box, one frane carrying` the shafts of said gears and the other frame being ari;l` nular and located witl"v in tlce box between the gear-shafts and the box-wall, and its inf..

box, a pinion secured to the gear-carrying;

roo

frame, a circular rack Within the box connected with the annular frame so as to turn therewith, gears in said box between the lastnarned pinion and the rack and engaging the pinion and the rack, and a third trarne connected to the second driven shaft and carrying t'lie last-named gears.

6. The combination with the two shafts to be driven with' a definite relative speed, oi a box turning with the iirst shait, gears in said box, a third shai't, a pinion thereon engaging said gears, and two trames, one france carry' ing tne gears and the other frame having an annular driving-surface with wl; ich said gears engage, a inernber having a second annular driving-surface turning with the second frame, one oi" said rarnrs being secured to said box, a pinion'secured to the gear-carrying traine, otner gears in said box engagn ing the last-named pinion and said second annular driving-surface, and a third trarne-- connected to the second driven shait and carrying the lastnamed gears.

7. The combination with the two shafts to be driven with a definite relative speed,- of a box turning with the first shaft, gears in said box, gear-shal'ts, a third shai't, a pinion thereon engaging said gears, and two frances, one frame carrying the shlai'ts of said gears and the other trarne having an annular rollingsurface with which. the shaits of said gears fiictionaily engage, a member having a second annular driving-surface. turning with the usecond trarne, one of said irarnes being secured to said box, a pinion secured to the gear-carrying iranie, other gears in said box engaging tie last-named pinion and said second annular driving-suri'ace, and a third .frame connected to the second driven shaft and carrying the last-named gears.

8. The combination with two shafts to be driven with a definite relative speed, of a third shait, a pinion on the third snai't, gears engaging said pinion, a trarne carrying said gears, a pinion carried by said trarne, other gears engaging the second pinion, a second frame carrying an annular driving-surface adapted to drive the first set of gears, one of said frarrres turning with one of the driven shafts, and a tipird frame carried by the other driven shaft, one of the last two` trames carrying the second set of gears `'and the other turning with an annular driving-surface adapted to engage the second set of gears.

9. The combination with two shafts to be turning with one of the shafts, a set of gearwheels witl in the box, annular driving rneans witlin the box and with which said gears engage, a central .pinion nies'ring with said gears, a cross-piece by wl ich said gears are held, a pinion secured to tle cross-piece,

, driven with a definite relative speed, of a box a second set of gear-Wheels with in th e box and nesli ing with the pinion secured to tite crosspiece, annular driving means witl in the box .wlY ich the second set of gears engage ,--a nd rreans ccnnecting the said mechanism withn in tle box and the other driven shai't. In te stinzony of wiich invention I' have hereunto set n y hand, at Stockholm, on this 8th day of July, 1905.

BIRGER jLJUNGSTROM. Witnesses:

AUGUsrUs E. INGRAM, HARRY ALBiLEN. 

